1. Construct a two-level directory with 0 to 90 numbers, each with a 2-digit name such as 00/79 and print out all the directories?

1. Construct a two-level directory with 0 to 90 numbers, each with a 2-digit name such as 00/79 and print out all the directories?

Reply to discussion (solution)

 #结果: Array ([0] = + [1] = [2] = [3] = [4] = [5] = [6] = [7] = 07 [8] =& Gt [9] [+] = [ten] = [one] = [all] = [+] = [+] = [+] = [] [[]] T [+] [+] = [+] [+] [+] = [+] [] [] [] [] [] [] [] [] [] [] Gt [+] = [+] = [+] [+] = [+] = [+] = [+] = [+] = [+] = [+] = [+] = [35] =& Gt [[+] = [PNS] = [Notoginseng] [+] [+] [+] [+] [+] = [+] = [+] = [+] = [+] = [[]] [[]] [43] [44] =& Gt [[] [[] [] [[] [] [] [[]] [[+] [] [[]] [[+] = [[]] Gt [[+] [[+]] [[+] [] [[+] [] [+] [+] [+] [+] [+] [+] [+] [+] [+] [+] [+] [+] = [+] = [62] =& Gt [[+] = [+] = [+] [+] [+] [+] [[[]] [[]] [[[]] [[]] [[]] [[] [] [[]] [[+] [] = [[]]  [[+] = [Bayi] = Bayi [[+] [+] = [[]] = [+] = [+] = [+] = [] [[[]] [[[]] [[]] [[]] [[]] [[+]] [[]]  > [98] = 98 [[+] = 99]

If you have more than two levels, you need to deal with this more.

Recursive directory name, theoretically support infinite level directory, Max is the numeric maximum function loopnames ($level, $max) {    static $data;    static $name;    for ($i = 0; $i <= $max; $i + +)    {        if ($level > 0)        {            $name [$level] = sprintf ("%02d", $i);            Loopnames ($level-1, $max);        }        else        {            $data [] = implode ('/', $name);            break;        }    }    return $data;} Set_time_limit (0); $t 1 = Microtime (true), $names = Loopnames (2), Echo Microtime (True)-$t 1;print_r ($names);// Output 10,000/*4.5159900188446array (    [0] = 00/00    [1] = 00/01    [2] = 00/02    [3] = = 00/03< C20/>[4] = 00/04    [5] = 00/05    [6] = 00/06    [7] = = 00/07    [8] = = 00/08    [9] = 00 /09    [Ten] = 00/10    [one] = 00/11    [All] = 00/12    [] = 00/13    [+] = 00/14    [ [] = 00/15 [+] =    00/16    [+] = 00/17    [+] = 00/18    [+] = 00/19...*/

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